// AddLink adds a link to file (in JSON format).
// file is supposed to be a JSON file in the read, watch or book format (see
// link-select/types for further details).
// It returns nil on success and the error on failure (propagates the error).
func AddLink(file string) error {
fmt.Fprintf(os.Stdout, "Adding to %s\n", file)
// input of title and link
var newEntry types.BaseRecord
kbInput := bufio.NewReader(os.Stdin)
fmt.Fprintf(os.Stdout, "Title: ")
newEntry.Title, _ = kbInput.ReadString('\n')
fmt.Fprintf(os.Stdout, "Link: ")
newEntry.Link, _ = kbInput.ReadString('\n')
// trim trailing newlines
newEntry.Title = strings.TrimSuffix(newEntry.Title, "\n")
newEntry.Link = strings.TrimSuffix(newEntry.Link, "\n")
// as appending to a JSON file does not work directory we do the following:
// (1) decode/parse JSON file
var list types.RecordList
if err := list.Read(file); err != nil {
return err
}
// (2) append input data to decoded/parsed data
list = append(list, newEntry)
// (3) serialize the new data back to the JSON file
// write back to JSON file
if err := list.Write(file); err != nil {
return err
}
return nil
}
// SelectLink selects a link from file and opens it in a bg process in browser.
// file is supposed to be a JSON file in the read, watch or book format (see
// link-select/types for further details).
// It returns nil on success and the error on failure (propagates the error).
func SelectLink(file string, browser string) error {
fmt.Fprintf(os.Stdout, "Selecting from %s\n", file)
var list types.RecordList
if err := list.Read(file); err != nil {
return err
}
if len(list) <= 0 {
return errors.New("List contains no links")
}
// set new seed to get non-deterministic random number generation
randSrc := rand.NewSource(time.Now().UnixNano())
r := rand.New(randSrc)
// select random article
rndArticle := r.Intn(len(list))
fmt.Fprintf(os.Stdout, "Selected \"%s\"\n", list[rndArticle].Title)
// open link in browser
cmd := exec.Command(browser, list[rndArticle].Link)
if err := cmd.Start(); err != nil {
fmt.Fprintf(os.Stderr, "Error while opening %s in %s\n",
list[rndArticle], browser)
return err
}
// remove selected article from list
list = append(list[:rndArticle], list[rndArticle+1:]...)
// write back to JSON file
if err := list.Write(file); err != nil {
return err
}
return nil
}
